Fluid passage terminus device



Patented Jan. 2, 1945 FLUID PASSAGE TERMINUS DEVICE Lloyd H. Scott,Garden City, N. Y., asslgnor to Eisemann Corporation, Brooklyn, N. Y., acorporation of Delaware Application May 12, 1942, Serial No. 442,617

2 Claims.

The present invention relates to fluid passage terminus devices whichmay be adapted for passing gaseous mediums into and out of encasedapparatus, more particularly for attachment to a ported wall thereofwith its interior in communication with the port and may be used toadvantage for ventiltaing or venting ignition interrupters ordistributors of magnetos or other encased magneto structure or batteryignition timer-distributors for internal combustion engines.

A general object of the present invention is the provision of such adevice which is of simple construction and economical to produce incommercial production adapted for passing gaseous medium when mounted inany desired position while efliciently excluding liquids and foreignparticles from the passage with which the fluid passage terminus deviceis associated.

A more specific object of the invention is the provision of such adevice which is so constructed as effectively to perform its functionsthough mounted in any position, such as upright, downwardly, sideways orotherwise, without danger of permitting passage of liquid such as water,oil, anti-freeze and de-icing liquids and the like from entering encasedapparatus, e. g., a magneto of an airplane engine.

Another object of the invention is to provide such a gaseous mediumpassage terminus device adapted for ready attachment to encasedapparatus and associated with a port in a wall thereof which in itsfunctioning takes advantage of restricted orifices characteristicthereof in excluding liquids and/or solids in gases or air that mayenter the encased apparatus therethrough or while venting gaseousmediums therefrom.

Other objects of the invention will in part be obvious and will in partappear hereinafter.

The invention accordingly comprises an article of manufacture possessingthe'features, properties, and the relation of elements which will beexemplified in the article hereinafter described and the scope of theinvention which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention,reference should be had to the following detailed description taken inconnection with the accompanying drawing, in which:

Fig. 1 is a perspective view of a preferred formof the apparatus of thepresent invention;

Fig. 2 is an elevational view with parts broken away of an encasedapparatus such as a magneto with the device of the present inventionmounted thereon;

Fig. 3 is a sectional view with parts broken present invention similartothat of Fig. 3 showing another position of mounting; and

Fig. 5 is a view similar to Fig. 4 showing a still further differentposition of mounting.

It is well known that in various types of encased apparatus such aselectrical mechanisms wherein operation is attained by electrical sparksor arcing such as ignition interrupters or distributors of magnetos orbattery ignition timer-distributors, corrosive gases result which in thepresence of moisture form nitric or nitrous acid corrosive to associatedstructure such as the insulation of cables. Many attempts have been madeeifectively to ventilate or vent such encased structure and to utilizesuch ventilators as inlets or outlets in the supercharging thereof asproposed in my copending application Serial No. 386,422, filed April 2,1941, which became Patent No. 2,286,233 issued June 16, 1942. However,prior to my present invention such attempts have usually failed to beeffective or entirely satisfactory by virtue of difliculties inpreventing ingress of solids or foreign particles such as dust, etc.,and liquids such as water, oil, anti-freeze and de-icing liquids, etc.,or by virtue of the complicated and consequent costly constructionthereof. The present invention efiiciently overcomes these difliculties.

Referring to the drawing, like numerals refer to like partsthroughout. Apreferred modification may comprise a hollow casing [0 adapted forattachment to a fluid barrier structure such as a wall II of an encasedapparatus such as a magneto l2, andin communication with a port thereinor fluid passage traversing the same. Such attachment may beaccomplished in any suitable manner, such as by engagement of threads l3in an internally threaded port or passage; or by other means such as bypress fitting into a socketed boss circumambient of such port or pasage;or by clips, bolts or the like engaged on the fluid barrier structuresuch as the apparatus wall. For example the threaded portion l3 may bethreaded into an internally threaded apertured boss M on the wall ll.

The hollow casing l0 preferably comprises three sections A, B and C. Thesection A is in the form of an imperforate cup-shaped end section, thesection B constitutes a ported section and section C is a base sectionof the hollow casing. It will be noted that the ported section B islocated between the end section A and the fluid barrier structure orwall II; or, more specifically, between the end section A andbasesection C. Obviously the base section C may be omitted by suitablyproviding a boss I on the wall II or securing the section B directly tothe wall of the device in any suitable manner.

In the preferred structure an annular sleeve I8 of substantial thicknessis provided with an external flange l8 and an internal bore l1shouldered at l8. A cup-shaped member [9 having an end wall preferablyflat as shown to provide a substantialy flat inner surface 2| has acylindrical side wall 22 the edge of which is fitted over the flange l8and fastened thereto in any suitable manner such as by spinnin over at23 The side wall 22 in the ported section thereof is suitably aperturedor ported perimetrically, or i. e. circumferentially when member I!) iscircular in cross-section, such as by the formation of elongatedapertures 24-24, preferably four in number, as shown and these aperturesmay be provided with suitable screens 25-25 to prevent ingress of largeforeign particles, such as dirt, hail, or the like.

A deflector member 28 is mounted upon the sleeve 16 and extendstherefrom into the end section A toward the surface 2| of the end wall20 and terminates in a baiile section 21 of greater cross-sectional areathan the major portion thereof as shown with the baflle sectionterminating in. a rim 28 spaced from the inner surfaces of both the sidewall 22 and the end wall 20, thereby providing a restricted gaseousfluid passage 29 therebetween. Preferably the deflector member 26comprises a cylindrical base portion 30 telescoped with the inner wallof the bore I1 of the sleeve l5 and having an edge 3| spun over theshoulder IS. The deflector member is preferably provided with anenlarged portion 32 between the base portion 38 and the baille portion21 to provide a shoulder 33 seating against the outer end of the sleeveI 5 for simplicity of construction.

It will thus be noted that when the device of the present invention ismounted in the position proposed in Fig. 3 any liquid which may enterapertures 24-24 will be prevented from travel with gaseous fluid or air,if such i being drawn in through passage 29, by the baffle 21 and theorifice provided by the annular passage 29 which is sufiicientlyrestricted to limit flow of gas through the device to a value wherebyentrained moisture or liquid and at least a major portion of dustparticles are separated out. The moisture or liquid which may thuscollect in the space 34 will as it accumulates run out apertures 24-24and the base portion 30 of the deflector member 26 provides an orifice35 for either inlet or outlet of gaseous fluid as the case may be.

With the device of the present invention mounted on a ported wall of anencased device in the position indicated in Fig. 4 any liquid which mayenter ports 24-24 will be collected in the bottom of the cup-shaped endsection 20 to form a liquid seal and gaseous fluid will passtherethrough around the baffle rim 28 and upwardly through orifice 35with a sufficient reduction in velocity to prevent drops of moisturefrom being carried upwardly by the gaseous current into the encasedstructure.

If the device of the present invention be mounted on encased apparatusin the position shown in Fig. 5, liquid that may enter upper ports 24-24will be ba-illed out by the baifle portion 21 from passage along withgas or air and will flow along the outside of portion 32 to escapethrough a lower port or ports 24-24. Obviously if the device in suchposition is being used as an exit or vent, free escape of gaseous fluidfrom encased structure will be permitted by the device while liquidswill be prevented from entering from the outside in a similar manner.

The structure also may include for assurance of efficiency additionalbailling means providing for further tortuous passage of gaseous medium.A shown this may comprise a transversely extending bafile member 36suspended in the orifice 35 thereby reducing the effectivecross-sectional area thereof. This baflie member preferably comprises atransversely extendingplate or circular flange 31 centrally positionedin the circular orifice 35 and provided at or near the periphery thereofwith a cylindrical flange 38 of appreciable depth extending toward theend section A or end wall 20 thereof thereby providing a catch basin3,9. The bafile member 36 may be suspended in any suitable manner suchas by circumferentially arranged support extending from the section 30of the deflector member 28 but preferably is suspended in the orifice 35by a member extending from the end wall 29 such as a tubular member 40closed at one end by a wall 4| riveted, or otherwise secured by anysuitable means, such as a rivet 42 to the end wall 20. As a result theorifice 35 is suitably restricted so as further to insure low velocityof gaseous fluid passin through the device and when the device is usedas an inlet effectively will baffle out liquid or moisture grains orforeign particles that occasionally may pass baffle 21.

The structure thus described is admirably suited for the inclusion of ascreening unit 43 which may be made from any fiuid-pervious materialsuch as felt or metallic gauze dipped in oil to serve as a filter forsolid particles, such as dust, to prevent their passage through thepassage 29. The filtering member 43 may be of annular form and is fittedupon the tubular member 40 with its outer periphery engaging the innerwall of the portion 30 of the deflector member 26 and it is furthersupported by the edge of the cylindrical flange 38. The filter serves toprevent the entrance of solid particles regardless of the position ofthe device.

When the device ofthe present invention is mounted in a position similarto that depicted in Fig. 3 and used as an inlet, air or other gaseousfluid drawn in through the device may take a path similar to thatindicated by the arrows in Fig. 3 and will be caused by the baflle plate31 and associated flange 38 sharply to bend outwardly to pass throughthe restricted orifice 35, as will be noted. As a consequence moistureor liquid grains or dust particles and the like which may be present inthe air currents will be caused to be thrown in the direction indicatedby the arrow X toward the basin 39 which effectively will collect themtherein and prevent them from entering the device. The amount of suchmaterial which may pass baflle 21 is so small as readily to Obviouslyincoming gaseous fluid such as air will take similar paths through thedevice when positioned as indicated in Figs 4 and 5 and the member 36will operate effectively as a baille to prevent entrance of moisture,grains and foreign particles while desirably reducing the effectivecross-sectional area of orifice 35 to reduce velocity and provide fortortuous passage therethrough. Obviously the baflle member 36 is notlimited in shape to that shown by way of example but preferably iscup-shaped toward the end section to provide the basin when in theposition depicted in Fig. 3. For example, flange 38 may gradually mergewith the portion 31 curvilinearly and as shown for economy of productionand simplicity of construction the tubular supporting be accommodated bythe dimensions of the basin member 40, end wall thereof 4!, the baflleflange 31 and the cylindrical flange 38 are made in one piece suitablydrawn from metallic material.

It will thus be seen that the objects set forth above are eflicientlyattained and since certain changes may be made in the above article, anddifferent embodiments of the invention could be made without departingfrom the scope thereof, it is intended that all matter contained in theabove description or shown in the accompanying drawing shall beinterpreted as illustrative and not as limiting the scope of thefollowing claims.

Having described my invention, what I claim as new and desire to secureby Letters Patent is:

l. A device for trappin liquids and solids in gaseous fluids passingthrough a member having a fluid passage, comprising a hollow casinghaving a base, an imperforate cup-shaped end and a ported sidewallbetween the base and the end, means on said base for securing the casingto said member, a tubular bafiie member within and spaced from saidcasing secured to said base in fluid-tight relationship thereto, saidbaflie member overlapping said ported sidewall and having an outwardlyflared open end terminating within and closely adjacent to saidcup-shaped end to provide a restricted passage for gaseous fluid betweensaid baflie and said cup-shaped end, and a baiile plate within andextending transversely of said bafile member and having a peripheralflange extending toward said cup-shaped end in closely spaced relationto said baffle member.

2. A device for trapping liquids and solids in gaseous fluids passingthrough a member having a fluid passage, comprising a hollow casinghaving a base, an imperforate cup-shaped end and a ported sidewallbetween the base and the end, means on said base for; securing thecasing to said member, a tubular baflie member within and spaced fromsaid casing secured to said base in fluid-tight relationship thereto,said bafiie member overlapping said ported sidewall and having anoutwardly flared open end terminating within and closely adjacent tosaid cup-shaped end to provide a restricted passage for gaseous fluidbetween said bafile and said cup-shaped end, a

20 tubular member secured to said cup-shaped end and extending withinsaid baffle member, a baflle plate extending laterally from said tubularmember within and transversely of said baille member, and having aperipheral flange extending toward said cup-shaped end in closely spacedrelation to said bafiie member. LLOYD H. SCO'I'I.

